Packaging paper is one of the most commonly used items in our daily work life. It is very rich in materials. Translucent paper, rust-proof paper, greaseproof paper, food packaging paper, etc. are all packaging paper, paper of various materials. Its characteristics are different, and the application occasions are different. Let's take a look at some of the requirements and features of some of the more commonly used materials.
Different papers have different characteristics. There is always a kind of paper that you want. The packaging paper requires high strength, low water content, low gas permeability, no corrosive effect, and certain water resistance. Paper used for food packaging also requires hygiene, sterility, pollution-free, paper bags and large plastic bags have no advantages, such as decorative.
Wrapping paper is widely used, and the largest one is food wrap, so it has the most machine specifications. Food packaging paper is divided into two categories: inner packaging and outer packaging.
Direct contact with food is called inner wrapper. In view of its characteristics, it is said to be clean, free of germs, and has the characteristics of moisture, oil, anti-stick, mildew, etc., which can preserve food well.
The outer wrapping paper is mainly used for beautifying and protecting the product. In addition to requiring a certain physical strength, it is also required to be clean and beautiful, and is suitable for printing multi-colored product patterns and characters.
Wrappers for liquid beverages such as milk and vegetable juice must also have excellent barrier properties. In order to meet the needs of long-term preservation and preservation, in recent years, special packaging soft packaging papers with paper and metal film composites, paper and plastic and metal film composites have been developed.